User Profiles

I am running Windows 2000 Pro. I’ve got a lot of computers that were logging into a workgroup environment. I am now switching them to logging into a domain which creates another profile. I am trying to do this without as little trouble as possible for the end user. I have been copying theiri favorites, etc over but the biggest thing that I have run into is that some of them use Auto Complete for passwords and also have some of their visited websites remember their logins. What do I need to copyover to the new profile so it will keep these profiles? So far I have been unable to figure it out.
Thanks